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# CS601 - Data Communication Online Quiz No. 4 Solution and Discussion Spring 2014 of Virtual University Due Date: August 19, 2014

CS601 - Data Communication Online Quiz No. 4 Solution and Discussion Spring 2014 of Virtual University Due Date: August 19, 2014

Quiz No. 4 of CS601 will be held on August 18, 2014 and will also remain open on August 19, 2014. Lecture no. 33 to 41 will be included in the quiz. You are required to attempt the quiz as early as possible once it is available to you.

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### Replies to This Discussion

CS601 Online Quiz#04

Attachments:

Question # 1 of 10 ( Start time: 04:18:27 PM ) Total Marks: 1
The Sum of the checksum and data at the receiver is ________ if there are no errors.
Select correct option:
1
0*
The complement of the checksum
The complement of the data

Question # 2 of 10 ( Start time: 04:19:54 PM ) Total Marks: 1
ZMODEM protocol combines the features of ____________________
Select correct option:
XMODEM
YMODEM
BOTH XMODEM & YMODEM*
None of the above
Question # 3 of 10 ( Start time: 04:20:35 PM ) Total Marks: 1
Which error detection method involves polynomials?
Select correct option:
Simple parity check
Longitudinal Red Check (LRC)
Cyclic Redundancy Check (CRC)*
Checksum

Question # 4 of 10 ( Start time: 04:21:34 PM ) Total Marks: 1
Which one is not the function of data link layer?
Select correct option:
Line discipline
Flow control
Error control
Network control*

Question # 5 of 10 ( Start time: 04:22:07 PM ) Total Marks: 1
In selective-reject ARQ, only the specific damaged or lost frame is_______________.
Select correct option:
retransmitted*
forwarded
selected
rejected

Question # 6 of 10 ( Start time: 04:23:01 PM ) Total Marks: 1
Data link control is composed of ____________ important functions.
Select correct option:
2
3*
4
5

Question # 7 of 10 ( Start time: 04:23:50 PM ) Total Marks: 1
The Hamming code is a method of __________.
Select correct option:
Error detection
Error correction
Error encapsulation
Error detection & error correction*

Question # 8 of 10 ( Start time: 04:24:29 PM ) Total Marks: 1
How many extra bits can detect single bit error?
Select correct option:
1*
3
2
4

Question # 9 of 10 ( Start time: 04:26:05 PM ) Total Marks: 1
BSC is example of Charater oriented protocols.
Select correct option:
True*
False

Question # 10 of 10 ( Start time: 04:27:01 PM ) Total Marks: 1
Data link protocols can be divided into ______________ sub-groups.
Select correct option:
two*
three
four
five

day's Quiz

Question # 1 of 10 ( Start time: 03:34:00 PM ) Total Marks: 1
VRC and LRC are based on?
Select correct option:
Multiplication
Subtraction
Division

Question # 2 of 10 ( Start time: 03:35:07 PM ) Total Marks: 1
HDLC is an acronym for ______________.
Select correct option:
High-duplex line communication
Host double-level circuit

Question # 3 of 10 ( Start time: 03:36:00 PM ) Total Marks: 1
In __________ ARQ, if a NAK is received, only the specific damaged or lost frame is retransmitted.
Select correct option:
Stop and Wait
Go-Back-N
Selective repeat*
Stop-and-wait & Go-back-N

Question # 4 of 10 ( Start time: 03:37:20 PM ) Total Marks: 1
If the ASCII character G is sent and the character D is received, what type of error is this?
Select correct option:
Single-bit*
Multiple-bit
Burst
Recoverable

Question # 5 of 10 ( Start time: 03:38:07 PM ) Total Marks: 1
Flow Control is the responsibility of _________
Select correct option:
Network Layer
Transport Layer
Physical Layer

Question # 6 of 10 ( Start time: 03:38:55 PM ) Total Marks: 1
There are _________ types of redundancy checks used in data communication.
Select correct option:
2
3
4*
None of the given

Question # 7 of 10 ( Start time: 03:39:49 PM ) Total Marks: 1
Which error detection method can detect a single-bit error?
Select correct option:
Simple parity check*
Two-dimensional parity check
CRC
All of the given

Question # 8 of 10 ( Start time: 03:41:04 PM ) Total Marks: 1
Which of the following technique can detect the burst error of more than ‘n’ bits with very high probability?
Select correct option:
CRC*
VRC
LRC
Checksum

Question # 9 of 10 ( Start time: 03:42:33 PM ) Total Marks: 1
BSC supports _____________ transmission using ______________ flow control.
Select correct option:
Full-duplex, Stop and wait ARQ
Half-duplex, Selective reject ARQ
Full-duplex, Selective reject ARQ
Half-duplex, Stop and wait ARQ*

Question # 10 of 10 ( Start time: 03:43:32 PM ) Total Marks: 1
In BSC frame, BCC are included for _______________.
Select correct option:
Synchronization
Error correction*
Acknowledgment
Asynchronization

There are _________ types of redundancy checks used in data communication.
4*
3
1
2

Which error detection method uses ones complement arithmetic?
Vertical Redundancy Check (VRC)
Longitudinal Red Check (LRC)
Cyclic Redundancy Check (CRC)
Checksum

The process to send control information in the information field of I-Frame along with data is called _____________
Acknowledgment management*
Piggy Forwarding
AckTrick
Piggybacking

Which of the following technique also called a parity check?
LRC
VRC
CRC
CheckSum

ZMODEM protocol combines the features of _________________
XMODEM
YMODEM
BOTH XMODEM & YMODEM*
None of the above

ARQ stands for ___________
Automatic repeat quantization
Automatic repeat request*
Automatic retransmission request
Acknowledge repeat request.

How many extra bits can detect single bit error?
1*
3
2
4

0 to 63

a crc remainder is

1

2

3

4

5

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